Greetings!

I've encountered an issue that's blocking me from moving forward with objection.js at the moment.

I have a DataModel (A) that has a many to many relationship with another DataModel (B) that has a many to many relation to another DataModel (C). Whenever I perform an upsert with using DataModel A objection always tries to insert the relation between BxC into the proper join table when the relation exists.

Is this a bug with the upsert graph and if not is there a way to prevent objection from inserting duplicate relations? It seems to handles the AxB relation just fine.

P.S. It also doesn't seem to properly unrelate the BxC the relation when it doesn't exist.